ML20012D439

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Forwards Application for Amend to License DPR-16,consisting of Tech Spec Change Request 186,allowing Idle Recirculation Loop to Be Isolated During Power Operation by Closing Suction,Discharge & Bypass Valves
ML20012D439
Person / Time
Site: Oyster Creek
Issue date: 03/19/1990
From: Fitzpatrick E
GENERAL PUBLIC UTILITIES CORP.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20012D440 List:
References
NUDOCS 9003270324
Download: ML20012D439 (4)


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GPU Nuclear Corporation . i i

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Route 9 South

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Forked River,New Jersey 087310388  ;

609 971 4000 -,

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, Writer's Direct Dial Number:

Mirch 19,'1990 .

U.S.' Nuclear Regulatory Commission '

, , Attentions Document Control Desk ,

t Washington,,DC 20555- <

< ' Gentlemen:

Subjects Oyster Creek Nuclear Generating Station'

-Docket No.-50-219 Technical' Specification Change Request No. 186 7 w,s, Id .

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' Pursuant to 10CFR50.90 and 10CFR50.91, GPU Nuclear Corporation (GPUN), operator of the Oyster Creek Nuclear Generating Station,. Provisional Operating License No.:DPR-16,. requests a change to Appendix A of.that licence.

.The enclosed Technical Specification Change Request (TSCR)-proposes to allow an;

-idle recirculation loop to be isolated. Oyster Creek is currently' authorized -

to continue. power operation if one of the five-recirculation. loops is.taken out '

.of service provided the idle loop is not isolated. The allowed configuration is'the loop discharge valve closed and the discharge bypass and suction valves-open.. This request would. allow the discharge bypass valve and suction valve to -

sbe closed.in addition to the discharge valve thus completely isolating the ,

portion.of the: recirculation loop containing;the pump. Loss-of-coolant accident'(LOCA) and' thermal stress analyses support the proposed change.- -

GPU Nuclear began preparation of this TSCR as a= result'of-a Technical >

Specification-required-shutdown on February 6, 1990. The shutdown was required when unidentified-leak rate approached the' Technical' specification-limit of 5 -

gallons _per minute. The leakage was due to a failed recirculation pump seal on recirculation loop A. If the pump could have~been isolated, the leakage might V have been-reduced and a shutdown-averted. ;We-believe the ability to isolate a recirculation pump would prevent unnecessary shutdowns in the future.

'At present, the same recirculation pump seal which failed in February 1990 has

.again shown_ indications of degradation. The pressure and temperature in the cavity between the #1 and #2 seals is elevated. Currently, there appears to be no effect on unidentified leak rate, however, further dugradation could result-in increasing seal' leakage and unidentified leak rate. Therefore, GPU Nuclear requests the NRC Staff to place a high priority on reviewing this request. We will-also consider requesting this change on an exigent basis should unidentified leak rate increase to the point where isolating the recirculation pump becomes necessary to attempt reducing the leak rate and avoid a plant shutdown.

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-TSCR186 GPU Nuclear Corporahon is a subsidiary of the General Public Utikties Corporation

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y' " 'This. license amendment request has been reviewed in accordance with section-6.5 of the Oyster Creek Technical Specifications, and using'the standards in

  • 10CFR50.92, we have concluded that this proposed change does not constitute a-  ;

significant hazards consideration. Pursuant to 10CFR50.91(b)(1), a copy of this amendment request-has been sent to the State of New Jersey Department of Environmental Protection.'

!- Very truly your ,,

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E itzpatrick }

Vice resident and Director '!

Oyster Creek i cc Regional Administrator

, Region I, U.S. Nuclear Regulatory Commission 475 Allendale Road

, King of Prussia, PA 19406

,NRC Resident' Inspector.

g Oyster' Creek Nuclear Generating Station Mr. Alex Dromerick U.S. Nuclear Regulatory Commission MailcStation P1-137

' Washington,'DC 20555 4 $ 'I

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TSCR186

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"; GPU Nuclear Corporation Qg f~ Postoffice Box 388 Route 9 South cm~

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Forked River,New Jersey 08731-0388' i

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Writer's Direct Dial Number:

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y March 19,1990 .;

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i f 'Mr. KentjTosch,. Chief <

I' ! i Bureau of Nuclear Engineering

,, Department of Environmental Protection

[ ,_ CN 411 4 Trenton,.NJ -08625 i ,.:

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Dear:

Mr. Tosch:

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Subject Oyster-Creek. Nuclear Generating Station 77 Provisional Operating License No. DPR-16 Technical Specification Change Request No. 186

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. Pursuant to.10CFR50.91(b)(1), please find enclosed a copy of the subject li  : document which was filed with the United States Nuclear Regulatory Commission on- March-19 , 1990.

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L Very truly yours,

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-i dl Fitzpatrick T L, a President and Director, R Oyster Creek o,E .)

P ': EF/PC/cb(TSCR186)

!, Attachment mJ<'o 4, d r

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, TSCR186

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GPU Nuclear Corporation is a subsidiary of the General Public Utilities Corporation

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  1. , j OPU Nuosear Corporation' A

-( g f' Post Office Box 388 -

Route 9 South Forked River, New Jersey 087310388; '

609 971 4000 t Writer's Direct Dial Number:  ;

u j March 19,1990 j;

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t The Ilonorable Debra Madensky; '$

. Mayor of.' Lacey Township 818. West Lacey Road. .

E Forked ~ River, New Jersey 08731 Dear Mayor Madensky

. Enclosed .herewit.h is .one copy of Technical Specification Change Request No'.186- '

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_for the.' Oyster Creek Nuclear Generating Station Operating License.

-This document'was filed with the United States Nuclear Regulatory Commission *

' on. March 19 , 1990.

Very truly yours,

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-.Eq tzpatrick: N" VIpe I esident and Director, oyshd r Creek

'EF/PC/cb(TSCR186) t Attachment

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i TSCR186 GPU Nuclear Corporation is a subsidiary of the General Public Utshties Corporation

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